Change-speed and reversing gearing.



W. J. VINCENT.

CHANGE SPEED AND nnvnnsmo emnmu.

APPLICATION FILED MAR.11,1911.

Patented Nov. 7, 1911.

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W. J. VINCENT. CHANGE SPEED AND REVBRSING GEARING.

APPLIUA'IION FILED MAR. 11, Hill Loumhm I'LANUUIQRI'II cu. WASIIINOTDN-n, :4

UNITED STATES PATENT OFFICE.

WILLIAM JOHN VINCENT, 0F CARDIFF, E

PUMP COMPANY, LIMITED, 0

NGLAND, ASSIGNOR' TO THE RO'I'OPLUNGE F CARDIFF, WALES, ENGLAND.

CI-IANGE-SPEED AND REVERSING GEARING.

T 0 all whom it may concern:

Be it known that I, \VILLIAM JOHN V IN- CENT, a subject of the King ofGreat Britain, residing at Albert Chambers, High street, Cardiff, ales,England, have invented new and useful Improvements in Change-Speed andReversing Gearing, of which the following is a specification.

This invention relates to a certain combination of a hydraulic clutchwith reversing epicyclic gearing for the purpose of obtaining aninfinite number of speeds in either direction. The hydraulic clutchconsists as is usual of a rotary pump delivering liquid to its ownsuction through a regulating valve. According to this invention thedriving shaft is connected to one of the members of the pump and alsohas fixed to it one of the elements of the epicyclic train, the otherelements of which are respectively carried by the driven shaft and theother member of the pump. The hydraulic clutch it is preferred to employis that described in the specification of the U. S. Patent No. 980,368.

Figure 1 is a longitudinal section of an apparatus constructed accordingto this vention. Figs. 2, 8 and 4 are sections on the lines 2-2, 3-3,and 44, Fig. 1, and Fig. 5 shows a detail.

1 is the driving shaft which has keyed to it the block 2 and the pinion3. The block 2 revolves in contact at one point with the casing4 and hasa number of radial cylinders 5 formed in it. These cylinders containpistons 6 carrying pins 7 the ends of which lie in eccentric grooves 8in the sides of the casing 4 so that as the shaft 1 and block 2 revolveclockwise relatively to the casing 4 the pistons are moved in and outand liquid is forced through the valve 9 in the direction of the arrow.By closing the valve 9 more or less the flow of liquid is throttled andthe casing 4 is carried around with the shaft 1 at a speed depending onthe amount of throttling. Hydraulic clutches of this type are well knownand no further description is therefore necessary. The casing 4 isextended on one side to contain the epicylic gearing hereinafterdescribed.

10 is the driven shaft which is recessed to receive the end of thedriving shaft 1. The end of the driven shaft 10 in square and carriesthe pinion 11 which can be moved to and fro along it by the fork 12carried by Specification of Letters Patent.

Application filed March 11, 1911.

Patented Nov. '7, 1911. Serial No. 613,837.

the pin 13 fixed to the sleeve 14 which can be moved to and fro by thearms 15 on the rocking shaft 16.

The epicyclic pinion 3 on the train is as follows :The shaft 1 is alwaysin gear with the pinion 17 on the shaft 18 which is free to revolve inhearings in the casing 4 and has also fixed to it the pinion 19. Theshaft 18 is cut away in the section Fig. 1 but is shown separately atFig. 5. The pinion 19 is always in gear with a pinion 20 fixed on theshaft 21 free to revolve in bearings in the casing 4 and having alsofixed to it the pinion 22. The sliding pinion 11 on the driven shaft 10can be put into gear either with the pinion 19 on the shaft 18 or withthe pinion 22 on the shaft 21 or it can be left between and out of gearwith them. 23 is a brake strap around the casing 4. lVith thisarrangement there are four positions in which the shaft 1 does not drivethe shaft 1O. A. Assume that all the parts are in the positions shown,the valve 9 being fully open as shown in Fig. 1, the brake 23 beingslack and the pinions 3-17, 19-11 and 1920 all in gear. Then the shaft 1and pinion 3 revolve clockwise, the case 4 of the pump and gear boxrevolve backward from the pinion 3. The shaft 10 is stationary as itsresistance is more than that of the case so that the pinion 17 walksbackward around the pinion 3 and the pinion 19 walks backward around thepinion 11 and as (in the arrangement shown) the reduction of gearsthrough 3 17, 1911, is two to one, it follows that the case revolvesbackward at half the speed of the shaft 1 while the shaft 10 remainsstationary. B. Next slide the pinion 11 out of mesh with 19 and then thecase becomes stationary and is quite a free member while the pinions3-17, 19, 20-22 all revolve. Now since there is no contact with thepinion 11 there is no movement of the case, except the frictionalmovement caused by the revolving shaft 1. C. If the clutch valve 9 benow closed, the case 4 will revolve locked to the shaft 1 by thecompressed liquid in the clutch but will only act as a fly wheel and dono useful work. D. Lastly. Open the clutch valve 9. Slide the pinion 11into mesh with the pinion 22. This causes the case 4 to revolve with theshaft 1, but at a reduced speed, according to reduction in speed throughthe pinions 317, 19, 2022 meshing into the pinion 11.

When the parts are in the position A above, the shaft 10 can be drivenby two methods. If the brake 23 be applied the case is brought to astandstill. Thus the motion of the shaft 1 is conveyed positivelythrough the gears to the pinion 11 thereby revolving the shaft 10 in thesame direction as the shaft 1, but at a reduced speed. This gives a lowspeed and the case becomes a stationary gear box. The brake 23 could beeased off a little and this would allow the case to revolve backward andgive a slower speed. 01' instead of putting on the brake 23 the valve 1)may be gradually closed; this compresses the liquid against the valveand causes the case to come from the backward motion into a forwardmotion. \Vhen the valve is fully closed it looks the whole together,therefore no pinions revolve relatively to the case but the wholerevolves as one unit including the shaft 11. If the valve is allowed toopen a little, liquid escapes past it and the speed of the case isslower than that of the shaft 1 and therefore the pinions revolverelatively to the case. Thus an infinite variety of speeds can beobtained, the more the valve is opened the greater the differencebetween the speed of the shaft 1 and case 4.

\Vhen the parts are in the positions B and C above, the shaft 11 cannotbe driven but when they are in the position I) it can be driven eitherbackward or forward. If the brake 23 be applied the case is brought to astandstill and there is a positive drive through the reduction gearswhich revr ves shaft 10 backward, that is the reverse. his speed can beregulated by slipping the brake a little or much. If the brake 23 bereleased and the clutch valve 9 be closed, the case is locked to theshaft 1; and therefore locks all the pinions, and the shaft 10 isrevolved in same direction as the shaft 1 thus giving a forward drivewhich can be varied by opening the valve more or less.

It will thus be seen that the direction of rotation of the shaft 11 canbe changed from reverse to forward or forward to reverse withoutshifting the gears, the brake gives the reverse and the valve theforward motion.

What I claim is 1. The combination of a pump having communicatingsuction and delivery passages and comprising a drum and a casingsurrounding it, a valve between the suction and delivery passages, anepicyclic train,

the middle element of which is carried by the casing, a driving shaftconnected to the drum and to one of the end elements of the cpicyclictrain, a driven shaft connected to the other end element of theepicyclic train, and a brake acting on the casing.

The combination of a pump having ctin'unul'iicating suction and deliverypassages, a valve between the suction and delivery passages, a reversingepicyclic train, a driving shaft connected to one member of the pump andto one element of the epicylic train, a driven shaft connected toanother element of the epicyclic train, and a brake acting on the thirdelement of the epicyclic train such element being connected to theothermember of the pump.

3. The combination of a pump having comnninicating suction and deliverypassages and comprising a drum and a casing surrounding it, a valvebetween the suction and delivery passages, a reversing epicyclic train,the middle element of which is carried by the casing, a driving shaftconnected to the drum and to one of the end elements of the epicyclictrain, a driven shaft connected to the other end element of thecpicyclic train, and a brake acting on the CtlSlll".

it. The combination of a pump having communicating suction and deliverypassages, a valve between the suction and delivery passages, anepicyclic train having reversing mechanism, a driving shaft con nectedto one member of the pumpand to one element of the epicyclic train, adriven shaft connected to another element of the epicyclic train, abrake acting on the third element of the epicyclic train such elementbeing connected to the other member of the pump.

5. The combination of a pump having communicating suction and deliverypassages and comprising a drum and a casing surrounding it, a. valvebetween the suction and delivery passages, an epicyclic train havingreversing mechanism, the middle element of which train is carried by thecasing, a drivin shaft connected to the drum and to one of the endelements of the epicyclic train, a driven shaft connected to the otherend element of the epicyclic train, a brake acting on the casing.

WILLIAM JOHN VINCENT.

\Vitnesses JOHN HIBBERT, R. F. WILLIAMS.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents, Washington, I). G.

